Actually they are not the same, In my circle the term 302 means non roller block, Where 5.0 means FACTORY ROLLER block. ( If i say i need a balancer for a 302 then im going to get a 28 oz balancer)
Yeah, the term 5.0 makes it easy to distinguish the different balance. I use them this way as well, but you can't count on other people to do the same. As evidenced by the whole Boss 302 thing. I have seen probably a dozen folks over the years insist that they had a Boss 302 in everything from a Maverick to a Granada. I had a neighbor tell me that his first car was a Maverick and that it came with a 390/4 speed. Never saw the car myself. Just heard him tell stories all the time.